[tcolvin]

The chances are, surely, that the aircraft remains are still in situ.
The Germans would not have dug them up as the cause of loss was known, although they would have recovered the bodies I assume. The Russian and Polish armies probably knew/know nothing of these events, and wouldn't be interested if they did.

The immediate site is safe since the Stukas were carrying not HE but practice smoke bombs.
But the range itself will be covered in military detritus including live ordnance left over a period of 130+ years. It is bound to be a restricted area.

I seem to remember there's someone on this board reassembling a Stuka. If he's short of bits, this site would seem to be the place to dig if someone could remember where on the range they went in, and if the Polish Army would give permission.
That's a lot of 'ifs'.
One clue that could narrow the choice of crash-site location could be the 'absturz im Wald' mentioned by Ed North. I can't see any trees using Google Earth, although I haven't looked closely, but there would be records showing where trees were in 1939, and they might be visible on the original 1937 Neuhammer aerial photograph held by the BundesArchiv.

Tony